Reports & Proceedings — Geological Society of London. 179 



attention is given to water supply, and the authors insist on the 

 importance of recording the geological and hydrographical data 

 afforded by wells. The book concludes with tables describing the 

 characters of the commoner minerals and rocks. 



The " Hints " are written in simple language, and should be of 

 value, not only for their immediate purpose, but also in spreading 

 an interest in geology amongst those who have such magnificent 

 opportunities of doing good scientific work if they will only make 

 themselves sufficiently acquainted with the subject. 



IV. BeIEF iS^OTICES. 



1. Nkw Zealand. Mines Department (Geological SuRVEr Branch). 



Seventh Annual Report, June, 1913. pp. 115-42, with 3 maps. — 

 This contains a general summary of the pi'ogress of the Survey and six 

 special reports, dealing with economic geology, by P. G. Morgan and 

 J. Allan Thomson. A report by J. A. Bartrum, on the geology of 

 the Te Puke District, Hauraki District, Auckland, contains notes on 

 the economic and general geology and on the petrography of the area. 

 Some interesting hypersthene-bearing rhyolites and andesites are 

 described. 



List of the Minerals of New Zealand. By P. G. Morgan and 

 J. A. Bartrum. pp. 32. 1913. — As it is intended to publish a hand- 

 book to the minerals of ISTew Zealand, this list is to be regarded as 

 provisional ; it has been compiled at very short notice to accompany 

 the " Catalogue and Description of Exhibits of the Mines Department " 

 prepared for the Auckland Exhibition. Even in this incomplete 

 state this publication will be of much value. It contains an 

 alphabetical list of minerals and of materials of economic importance, 

 with the localities at which each occurs and abundant references to 

 the literature. 



2. Miocene Ostracoda. — Dr. Bela Zalanyi has issued in the Mitt. 

 Jahrb. k. Ungarisch. geol. Keichsanstalt, vol. xxi, pt. iv, pp. 87-152, 

 pis. v-ix, a most valuable paper on the Miocene Ostracoda of Hungary. 

 Forty-one species are described, of which twenty-five are new to 

 Hungary and twelve are new to science. Dr. Zalanyi has given large 

 and excellent figures, and has paid especial attention to the hinge and 

 muscle-spots of these small Crustacea, and the paper should be of much 

 interest and service to students of European forms. 



I. — Geological Society of London. 

 1. Fehruary 4, 1914.— Dr. Aubrey Strahan, F.R.S., President, 



in the Chair. 

 The following communications were read: — 



1. "The Lithology and Composition of Durham :Aragnesian Lime- 

 stones." By Charles Taylor Trenchmann, B.Sc, F.G.S. 



The present communication is the result of a somewhat close 

 inquiry into the composition and lithology of the Magnesian Lime- 

 stones of Durham in all tlieir divisions and conditions of alteration. 



